Re: [CAD_CAM_EDM_DRO] Re: A Z80 guy needs help!

One alternative, though not neccessarily the quickest, would be to program a
Perl script, and run it through your C compiler. At minimum you'd need the
proper include files, and probably the gcc compiler. I'm not sure they do a Z80
version though.

Bill

On Sun Jan 20 09:25:18 2002, mariss92705, <mariss92705@...> wrote:

>Hi,
>
>This is a for a "G-Code in, step/direction out" project that will
>take about a year to complete. All motion is vector based and works
>on the assumption that position is the running sum of precise
>velocities, each applied for a precise period of time (1/1,024 of a
>second).
>
>For circular interpolation this would be:
>
>Xv = R sin (theta + delta) - R sin (theta)
>Yv = R cos (theta + delta) - R cos (theta)
>
>Replace (theta) with (theta + delta) for next time period.
>
>Delta is the angular distance to be moved in 1 time period and is
>dependent on the value for R and the programmed vector velocity.
>
>This requires solving for sin/cos in the shortest time possible to a
>24 bit accuracy. I am using a Chebysheff polynomial expansion
>coefficients to converge the series in the fewest possible terms. For
>this I have a "roll your own" math package in assembly to do it.
>
>It seems I will have to learn C as well (learning makes my head
>hurt!).
>
>Mariss
>
>
>--- In CAD_CAM_EDM_DRO@y..., Russell Shaw <rjshaw@i...> wrote:
>>
>>
>> Your samples may be rapid, but the calculations only need to
>> be done at a rate that suits the control loop response time.
>> If you keep the calculation rate in a separate slower loop
>> compared to the parts that keeps track of the instantaneous
>> servo movement, slower code and more efficient use of the
>> cpu can be had. It depends on what the exact control methods
>> are.

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